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(No Model.) 2 Sheets-Sheet 1.

D H. GAIL. Machine for Forming Conical Wire Springs. No. 228,624. g Patented JUne.8,1880.

' ATTORNEY Q WITNESSES I 2 sheets-sheep: 2.

(No Model.)

D. H. GAIL. Machine for Forming Conical Wire Sprmgs.

Patented June 8; 1880.

R .0 T f N ATTORNEY WITNESSES ILPETERS. PHOTO-LIYHOGRAPHER. WASHINGTON. n O.

UNITED STATES PATENT Orricri.

DANIEL H. GAIL, OF BURLINGTON, IOWA,'ASSIGNOR TO SOLOMON MGNEILL AND RICHARD S. MCENTIRE, OF SAME PLAOE, ONE-THIRD TO EACH.

MACHINE FOR FORMING CONICAL WIRE SPRINGS.

SPECIFICATION forming part of Letters Patent No. 228,624, dated June 8, 1880.

1 Application filed March 31,1880. '(NomodeL) I the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

My invention relates to improvements in machines for coiling conoidal or conical spiral metallic springs in pairs, in which the two springs of each pair are side by side and are formed of a single wire which connects them at their bases and the objects of my improvements are, first, to afford facilities for coiling the wire from both ends at the same time on conoidal grooved mandrels journaled at fixed distances apart, about equal to the distance between the. springs of each pair when completed; second, to provide means of rotating both coilinganandrels from the same driveshaft; third, to provide a pair of conical rollers for pressing the springs into the grooves of the mandrel as they are coiled thereon fourth, to provide means for moving the press-rollers to and from the coilin g-mandrels; fifth, to pro vide means of securing the ends of the wire to the coiling-mandrels, so that they can be released when the coils are formed. I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure l is a perspective of the entire machine. Fig. 2 is a top plan. Fig. 3 is a side elevation. Fig.4 is an end elevation. Fig.5 is a plan of the hinged press-roller carrier. Fig. 6 is a detail View, hereinafter referred to. Figs. 7 and 8 are, respectively, a plan and elevation of a completed spring.

Referring to the drawings by letters, the same letter indicating the same part in the different figures, letterArepresents a base, with blocks B O O, which support the working parts. The

base A may be as shown, so that it can be attached where desired, or it may be the top of a suitable table.

D D are conical mandrels, fixed with their base ends each to a separate shaft, E, which shafts are journaled in suitable bearings in the blocks B O, and provided each with a pinion, E, both of which pinions gear with a spur-pinion, F, which is carried on a shaft,

F. The shaft F is also journaled in suitable hearings in the blocks B O, and may be rotated by a crank, F,or by connection with any suitable power. Each mandrel D has a spiral groove, d, formed in its exterior, and a hole, (1, in its apex end, and the spiral grooves d terminate at the small end of the mandrel, preferably with a shoulder, cl.

G is a frame below the mandrels D, and is hinged at one side to the block 0. The frame Ghas slots 9 transversely to the mandrels D. H H H H are standards, which may be adjusted laterally on the frame G, and retained after adjustment by the bolts h, which pass through the slots 9. I I are conical press-rollers, journaled at their base ends in the standards H, and at their apexes in the standards H.

J J are toggle-arms, hinged to each otherat j. The arm J is hinged at its upper part to the outer or free side of the frame G, and the away for about one-half of its length, as shown I at Fig. 0, which is a perspective thereof, with a wire, L, inserted therein.

In operation, the wires L are'cut in proper lengths, and their ends Z bent as shown in the drawings. The ends l are inserted in the holders K, as shown at Fig. 6, and the holders K then inserted, one in each hole (1 in the mandrels D, as shown at Fig.1. The mandrels D may then be simultaneously rotated by the shaft F to coil the wire in the grooves 5 d, and the operator, by pressing with his leg against the toggle J J, may force the pressrolls I upward against the wire as it is coiled wound thereon, except the central part, L, as.

shown by dotted lines at Fig. 1.

By lowering the press-rolls I, as hereinbefore described, and withdrawing the holders K, the coils may be easily removed from the mandrels D, and will be as shown at Figs. 7 and 8.

The toggle J J may be operated by a footpedal, if preferred.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a machine for forming conical wire springs, the conoidal grooved mandrels D, arranged near to each other, and intermediate connecting mechanism, whereby said mandrels are adapted to be simultaneously rotated to form both coils of a double-conical spiral spring from one drive-shaft, substantially as described, and for the purpose specified.

2. In a machine for forming conical wire springs, the combination, with the conical grooved mandrels D and shafts E, having pinions E, of the shaft F, having pinion F, and adapted to impart simultaneous rotary movement to the mandrels D, substantially as and for the purpose specified.

3. In a machine for forming conical wire springs, the combination, with the conical grooved mandrels D. of the conical press-rolls I, adapted to press the wire into the grooves d, substantially as and for the purpose specified.

4. In a machine for forming conical wire springs, the combination, with the conical grooved mandrels D, of the conical press-rolls I and hinged frame G, adapted to move the rolls I toward and from the mandrels D, substantially as and for the purpose specified.

5. In a machine for forming conical wire springs, the combination, with the conical grooved mandrels D, of the press-rolls I and hinged frame G, to which the press-rolls areattached so as to be adjusted laterally, substantially as and for the purpose specified.

6. In a machine for forming conical wire springs, the combination, with the grooved mandrels D, of the press-rolls I and hinged frame G, the toggle J J, adapted to raise and lower the frame G, and rolls I, substantially as and for the purpose specified.

7. In a machine for forming conical wire springs, the combination of a conical grooved mandrel, D, having a hole, 61, in its apex, and a tubular wire-holder, K, having one side cut away for about one-half its length, whereby it is adapted to hold the wire directly in the mandrel, and to be removed to release it when the coil is formed, substantially in the manner herein shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

DANIEL H. GAIL.

Witnesses:

H. A. ALLEN, P. R. RIcHAaDs. 

